PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/17-16:28:10
G02     52.9           38.2                8.6 +/-    0.40      12.9 +/-    0.40  0.030 / 0.030
G05     81.5           69.6                8.9 +/-    0.35       9.4 +/-    0.35  0.020 / 0.030
G12     187.9          42.7               10.8 +/-    2.14      15.0 +/-    2.14  0.150 / 0.350
G20     204.0          50.0               12.3 +/-    1.03      15.6 +/-    1.03  0.180 / 0.370
G21     265.0          14.0                8.7 +/-    4.39      22.1 +/-    4.39  0.070 / 0.080
G25     248.1          56.8               10.4 +/-    1.25      12.2 +/-    1.25  0.080 / 0.060
G29     326.6          51.6                8.4 +/-    0.73      10.3 +/-    0.73  0.050 / 0.070